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1 DC, 1 AD are subdomains possible?

Hi Experts
Is it possible to add subdomains to my Windows Server Standard 2008 AD?
We have 1 DC only with single Domain group.local.  Would like to add 2 sub domains companyA.group.local, companyB.group.local.

Thanks in Advance
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freshfordian
Asked:
freshfordian
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2 Solutions
 
Krzysztof PytkoActive Directory EngineerCommented:
Yes it is possible without any problem. But I strongly suggest to add one more Domain Controller with DNS role in parent domain for redundancy (security issues). And remember, when you add child domain, you need for that Enterprise Administrator account.

One more important thing, is to check Foresy Functional Level in the existing domain. Then you will know what kind of Windows Server may act as Domain Controllers in child domains.

During child domain setup, make sure that servers point only to DNS IP address in parent domain. They need to contact Domain Naming master to evaluate if namespace can be created and account has appropriate permissions.

Regards,
Krzysztof
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Tony JLead Technical ArchitectCommented:
Reading a bit more into your question - if you mean with only the one DC, then no: you would need at least one DC for each sub-domain.

Otherwise, as Kyzysztof said.
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freshfordianAuthor Commented:
Thanks Guys.  

I felt that I might need a DC for each child domain alright but as I only have 1 DC, then creating child domains in this scenario is not possible.  This is the correct interpretation I think?
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Tony JLead Technical ArchitectCommented:
Yes.

Unless you wanted to virtualise your existing DC server using a physical to virtual conversion program and run 3 virtual operating systems with something like vmware, hyper-v or xen.

Some all have free versions.

Happy to advise if you need help.
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freshfordianAuthor Commented:
thanks again.  your comments have really helped.
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